"Finding Prime Numbers" Multiples and Factors PPT Download

Description

"Finding Prime Numbers" Multiples and Factors PPT Download

Part One: Learning Objectives

1. In teaching activities, help students understand the meaning of prime numbers and composite numbers.

2. Cultivate students’ abilities of observation, comparison, abstraction and generalization.

focus

In the activity of using small squares to form rectangles, you will experience the process of exploring prime numbers and composite numbers, and understand the meaning of prime numbers and composite numbers.

difficulty

Able to correctly judge prime numbers and composite numbers.

Finding Prime Numbers PPT, Part 2: Review and Review

Find all the factors of each of the following numbers.

All factors of 16: (　).

All factors of 11: (　).

All factors of 32: (　).

All factors of 1: (　).

All factors of 100: ( ).

Finding Prime Numbers PPT, Part 3: Interpretation of Examples

12 small squares can be used to make 3 types of rectangles.

How many rectangles can be made from 2, 3,...,11 small squares? Complete the table below.

5 small squares can only form one rectangle, and the factors of 5 are only 1 and 5.

Some numbers have only 2 factors, such as 2, 3, 5,... Some numbers have more than 2 factors...

Recognize it and fill it out.

A number that has only two factors, 1 and itself, is called a prime number.

A number that has other factors besides 1 and itself is called a composite number.

1 is neither a prime number nor a composite number.

Typical examples

[Example 1] Among the following numbers, which ones are composite numbers? Which ones are prime numbers?

1,13,24,29,41,57,63,79,87

[Example 2] Fill in () with different prime numbers.

12=()+()

21=()+()+()

15=()+()+()

Finding Prime Numbers PPT, Part 4: Summary

Recognize prime numbers and composite numbers

Prime number: A number that has only two factors: 1 and itself.

Composite number: A number that has factors other than 1 and itself.

Determine whether a number is prime or composite

Method 1: Look at the number of factors of this number. A number with only two factors is a prime number, and a number with three or more factors is a composite number.

Method 2: To determine whether a natural number is a prime number, you can use all the prime numbers smaller than it to divide the natural number from small to large. If it cannot be divided, it is a prime number, otherwise it is a composite number.

Finding Prime Numbers PPT, Part 5: Quiz in class

1. Use 13, 14, 15, and 16 small squares to form several rectangles to complete the table below.

2. Score a point and share your thoughts with your peers.

3.Guess who I am.

4. You talk and I talk.

Finding Prime Numbers PPT, Part Six: Homework

1. Select from the after-class exercises;

2. Complete the exercises in this lesson in the exercise book.

Keywords: Beijing Normal University edition fifth grade mathematics PPT courseware free download, find prime numbers PPT download, multiples and factors PPT download, .PPT format;

For more information about the "Finding Prime Numbers Multiples and Factors" PPT courseware, please click on the "Finding Prime Numbers PPT Multiples and Factors PPT" tab.

"Finding Prime Numbers" Multiples and Factors PPT teaching courseware:

"Finding Prime Numbers" Multiples and Factors PPT teaching courseware Part One: Review of old knowledge Three rectangles can be made from 12 small squares. ... ... ... Find Prime Numbers PPT, Part 2: Exploring New Knowledge Using 23, 11 small squares, you can...

"Finding Prime Numbers" Multiples and Factors PPT:

"Finding Prime Numbers" Multiples and Factors PPT Part One Content: Classroom Introduction 1. In the activity of using small squares to form rectangles, experience the process of exploring prime numbers and composite numbers, and understand the meaning of prime numbers and composite numbers. Able to correctly judge prime numbers and composite numbers. 2. In the process of solving the problem...

"Finding Prime Numbers" Multiples and Factors PPT Courseware:

"Finding Prime Numbers" Multiples and Factors PPT courseware. Recognize it and fill it in. A number that has only two factors, 1 and itself, is called a prime number. A number that has other factors besides 1 and itself is called a composite number. 1 is neither a prime number nor a composite number. ..

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Update Time: 2024-11-20

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 1 industry PPT template

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